Table 1. Literature estimates of mitochondrial content in tissues.

References	Source of isolated mitochondria	Estimated mitochondria per mg
Estabrook and Holowinsky. J Biophys Biochem Cyto., 9(1): 19–28, 1961; citations 4,5 within	rat liver	7.2 ∙ 109
Schwerzmann, et al. J Cell Biol. 102: 97–103, 1986	rat liver	7 to 9 ∙ 109